package no.uib.prideconverter.util;

import java.lang.reflect.Method;
import javax.swing.JOptionPane;
import java.util.Arrays;

/**
 * <b>Bare Bones Browser Launch for Java</b><br>
 * Utility class to open a web page from a Swing application
 * in the user's default browser.<br>
 * Supports: Mac OS X, GNU/Linux, Unix, Windows XP/Vista<br>
 * Example Usage:<code><br> &nbsp; &nbsp;
 *    String url = "http://www.google.com/";<br> &nbsp; &nbsp;
 *    BareBonesBrowserLaunch.openURL(url);<br></code>
 * Latest Version: <a href="http://www.centerkey.com/java/browser/">www.centerkey.com/java/browser</a><br>
 * Author: Dem Pilafian<br>
 * Public Domain Software -- Free to Use as You Like
 * @version 2.0, May 26, 2009
 */
public class BareBonesBrowserLaunch {

    private static final String errMsg = "Error attempting to launch web browser";
    static final String[] browsers = {"firefox", "opera", "konqueror", "epiphany",
        "seamonkey", "galeon", "kazehakase", "mozilla", "netscape"};

    public static void openURL(String url) {

        String osName = System.getProperty("os.name");

        try {
            if (osName.startsWith("Mac OS")) {
                Class fileMgr = Class.forName("com.apple.eio.FileManager");
                Method openURL = fileMgr.getDeclaredMethod("openURL", new Class[]{String.class});
                openURL.invoke(null, new Object[]{url});
            } else if (osName.startsWith("Windows")) {
                Runtime.getRuntime().exec("rundll32 url.dll,FileProtocolHandler " + url);
            } else { //assume Unix or Linux

                boolean found = false;

                for (String browser : browsers) {
                    if (!found) {
                        found = Runtime.getRuntime().exec(
                                new String[]{"which", browser}).waitFor() == 0;
                        if (found) {
                            Runtime.getRuntime().exec(new String[]{browser, url});
                        }
                    }
                }

                if (!found) {
                    throw new Exception(Arrays.toString(browsers));
                }
            }
        } catch (Exception e) {
            JOptionPane.showMessageDialog(null, errMsg + ":\n" + e.getLocalizedMessage(),
                    "Web Page Not Available", JOptionPane.ERROR_MESSAGE);

            Util.writeToErrorLog("Error when trying to open web page: ");
            e.printStackTrace();
        }
    }
}
